Answer:
all are functions except the graph because if u use a ruler it touches the lines more than once at one time
Step-by-step explanation:
mrk me brainliest plz
Answer: 4.34
Step-by-step explanation:
Answer:
19 days
Step-by-step explanation:
Given
--- initial
-- rate
Required
Days when the fish gets to 30
The function is exponential and as such it follows;

Where x represents the number of days and y the number of fishes
Because the fishes decreases;

So, we have:

Express as decimal


In 



So, we have:

Divide both sides by 150

Take log of both sides

Apply law of logarithm

Make x the subject




<em>Hence, it takes approximately 19 days</em>
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</span><span>http://www.squiglysplayhouse.com/BrainTeasers/bt.php?id=119
this should help</span>